Patents by Inventor Chul Ha Ju
Chul Ha Ju has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10526451Abstract: Disclosed is a polyamide-imide precursor having a molecular structure in which a first polymer, derived from polymerization of a dianhydride and a diamine, and a second polymer, derived from polymerization of a diamine and an aromatic dicarbonyl compound, are copolymerized, wherein the diamine includes 3 to 50 mol % of at least one of 9,9-bis(4-aminophenyl)fluorene (FDA) and 9,9-bis(4-amino-3-fluorophenyl)fluorene (F-FDA), based on the total molar amount of the diamine. Also, a copolymerized polyamide-imide in which the polyamide-imide precursor is imidized or a copolymerized polyamide-imide film formed by an imidization reaction of the polyamide-imide precursor and an image display device including the copolymerized polyamide-imide film are provided.Type: GrantFiled: June 27, 2016Date of Patent: January 7, 2020Assignee: KOLON INDUSTRIES, INC.Inventors: Chul Ha Ju, Hak Gee Jung, Hyo Jun Park
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Publication number: 20180186936Abstract: Disclosed is a polyamide-imide precursor having a molecular structure in which a first polymer, derived from polymerization of a dianhydride and a diamine, and a second polymer, derived from polymerization of a diamine and an aromatic dicarbonyl compound, are copolymerized, wherein the diamine includes 3 to 50 mol % of at least one of 9,9-bis(4-aminophenyl)fluorene (FDA) and 9,9-bis(4-amino-3-fluorophenyl)fluorene (F-FDA), based on the total molar amount of the diamine. Also, a copolymerized polyamide-imide in which the polyamide-imide precursor is imidized or a copolymerized polyamide-imide film formed by an imidization reaction of the polyamide-imide precursor and an image display device including the copolymerized polyamide-imide film are provided.Type: ApplicationFiled: June 27, 2016Publication date: July 5, 2018Applicant: KOLON INDUSTRIES, INC.Inventors: Chul Ha JU, Hak Gee JUNG, Hyo Jun PARK
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Patent number: 9982103Abstract: This invention relates to polyimide, which includes amorphous silica particles having OH groups thereon and is thus highly heat-resistant, colorless and transparent, and to a polyimide film manufactured using the polyimide.Type: GrantFiled: June 27, 2013Date of Patent: May 29, 2018Assignee: KOLON INDUSTRIES, INC.Inventors: Chul Ha Ju, Hyo Jun Park, Hak Gee Jung
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Publication number: 20180134848Abstract: This invention relates to a polyimide resin and a film using the same, wherein the polyimide resin is an imidized product of polyamic acid in which a polymerization composition including a diamine-based monomer and a dianhydride-based monomer is copolymerized, at least one of the diamine-based monomer and the dianhydride-based monomer including a monomer containing at least one selected from among an oxy group, a sulfone group and a fluoro group, the diamine-based monomer including at least one selected from among 1,3-bis(4-aminophenoxy)benzene and 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane, and thus the polyimide resin has improved heat resistance and mechanical properties while being colorless and transparent and can thus be efficiently applied to a variety of fields, including semiconductor insulation layers, TFT-LCD insulation layers, passivation layers, liquid crystal alignment layers, optical communication materials, protective layers for solar cells, and flexible display substrates.Type: ApplicationFiled: April 28, 2015Publication date: May 17, 2018Applicant: KOLON INDUSTRIES, INC.Inventors: Chul Ha JU, Hak Gee JUNG, Hyo Jun PARK
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Patent number: 9706649Abstract: The present invention provides a plastic substrate, including: a polyimide film; a hard coating layer formed on one side of the polyimide film; and a transparent electrode layer formed on the other side of the polyimide film. The plastic substrate has excellent light transmittance high hardness characteristics, superior ITO processability and flexibility. Further, the plastic substrate can function as both a window film and an electrode film when it is applied to a touch screen panel. Thus, the present invention provides a touch screen panel which can be slimmed by reducing the number of laminated films including the plastic substrate.Type: GrantFiled: December 26, 2012Date of Patent: July 11, 2017Assignee: KOLON INDUSTRIES, INC.Inventors: Hak Gee Jung, Hyo Jun Park, Chul Ha Ju
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Patent number: 9580555Abstract: Disclosed are a transparent polyamide-imide resin and a film using the same, which can be colorless and transparent, can show excellent thermal stability and mechanical properties, and can have low birefringence, making it possible to serve in various fields including a semiconductor insulator, a TFT-LCD insulator, a passivation layer, a liquid crystal alignment layer, materials for optical communication, a protective film for a solar cell, a flexible display substrate and the like.Type: GrantFiled: December 26, 2014Date of Patent: February 28, 2017Assignee: KOLON INDUSTRIES, INC.Inventors: Chul Ha Ju, Hyo Jun Park, Hak Gee Jung
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Publication number: 20160319076Abstract: Disclosed are a transparent polyamide-imide resin and a film using the same, which can be colorless and transparent, can show excellent thermal stability and mechanical properties, and can have low birefringence, making it possible to serve in various fields including a semiconductor insulator, a TFT-LCD insulator, a passivation layer, a liquid crystal alignment layer, materials for optical communication, a protective film for a solar cell, a flexible display substrate and the like.Type: ApplicationFiled: December 26, 2014Publication date: November 3, 2016Applicant: KOLON INDUSTRIES, INC.Inventors: Chul Ha JU, Hyo Jun PARK, Hak Gee JUNG
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Publication number: 20160096952Abstract: Disclosed herein is a polyimide resin including a silica filler surface-treated with a fluorine-containing compound, and a polyimide film formed using the polyimide resin. The polyimide resin has improved dispersibility and heat resistance because the surface of a silica filler is fluorinated.Type: ApplicationFiled: May 20, 2013Publication date: April 7, 2016Applicant: KOLON INDUSTRIES, INC.Inventors: Hyo Jun PARK, Hak Gee JUNG, Chul Ha JU
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Patent number: 9061474Abstract: The present invention relates to a transparent polyimide film with improved tensile strength and a preparation method thereof, and more specifically to a colorless, transparent polyimide film having excellent optical properties and improved tear strength at the same time through the use of a monomer containing a functional group or an improver for improving tensile strength, and a preparation method thereof, wherein the functional group is selected from the group consisting of a hexafluoro group, a sulfone group, and an oxy group.Type: GrantFiled: May 27, 2011Date of Patent: June 23, 2015Assignee: KOLON INDUSTRIES, INC.Inventors: Chul Ha Ju, Hyo Jun Park, Hak Gee Jung
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Publication number: 20150152232Abstract: This invention relates to polyimide, which includes amorphous silica particles having OH groups thereon and is thus highly heat-resistant, colorless and transparent, and to a polyimide film manufactured using the polyimide.Type: ApplicationFiled: June 27, 2013Publication date: June 4, 2015Applicant: KOLON INDUSTRIES, INC.Inventors: Chul Ha Ju, Hyo Jun Park, Hak Gee Jung
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Publication number: 20140338959Abstract: The present invention provides a plastic substrate, including: a polyimide film; a hard coating layer formed on one side of the polyimide film; and a transparent electrode layer formed on the other side of the polyimide film. The plastic substrate has excellent light transmittance high hardness characteristics, superior ITO proccessability and flexibility. Further, the plastic substrate can function as both a window film and an electrode film when it is applied to a touch screen panel. Thus, the present invention provides a touch screen panel which can be slimmed by reducing the number of laminated films including the plastic substrate.Type: ApplicationFiled: December 26, 2012Publication date: November 20, 2014Applicant: KOLON INDUSTRIES, INC.Inventors: Hak Gee Jung, Hyo Jun Park, Chul Ha Ju
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Publication number: 20130274394Abstract: The present invention relates to a transparent polyimide film with improved tensile strength and a preparation method thereof, and more specifically to a colorless, transparent polyimide film having excellent optical properties and improved tear strength at the same time through the use of a monomer containing a functional group or an improver for improving tensile strength, and a preparation method thereof, wherein the functional group is selected from the group consisting of a hexafluoro group, a sulfone group, and an oxy group.Type: ApplicationFiled: May 27, 2011Publication date: October 17, 2013Applicant: KOLON INDUSTRIES, INC.Inventors: Chul Ha Ju, Hyo Jun Park, Hak Gee Jung
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Patent number: RE48141Abstract: Disclosed are a transparent polyamide-imide resin and a film using the same, which can be colorless and transparent, can show excellent thermal stability and mechanical properties, and can have low birefringence, making it possible to serve in various fields including a semiconductor insulator, a TFT-LCD insulator, a passivation layer, a liquid crystal alignment layer, materials for optical communication, a protective film for a solar cell, a flexible display substrate and the like.Type: GrantFiled: October 5, 2018Date of Patent: August 4, 2020Assignee: KOLON INDUSTRIES, INC.Inventors: Chul Ha Ju, Hyo Jun Park, Hak Gee Jung